[  382.538886] PPP generic driver version 2.4.2
[  382.540278] NET: Registered PF_PPPOX protocol family
[  382.542464] l2tp_core: L2TP core driver, V2.0
[  382.543398] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[  386.993178] iperf3 (9666) used greatest stack depth: 11496 bytes left
[  387.018980] ppp0: recursion detected
[  388.030211] ppp0: recursion detected